// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once

#include <pollux/dwio/dwrf/common/common.h>
#include <pollux/dwio/dwrf/common/encryption_common.h>
#include <pollux/dwio/dwrf/common/file_metadata.h>

namespace kumo::pollux::dwrf::encryption {

class DecryptionHandler
    : public EncryptionHandlerBase<dwio::common::encryption::Decrypter> {
 public:
  void setKeys(const google::protobuf::RepeatedPtrField<std::string>& keys);

  static std::unique_ptr<DecryptionHandler> create(
      const proto::Footer& footer,
      dwio::common::encryption::DecrypterFactory* factory = nullptr);

  // Temporary function before Footer can totally replace proto::Footer
  static std::unique_ptr<DecryptionHandler> create(
      const FooterWrapper& footer,
      dwio::common::encryption::DecrypterFactory* factory = nullptr);

 private:
  void populateNodeMaps(
      const google::protobuf::RepeatedPtrField<proto::Type>& schema,
      uint32_t root,
      uint32_t groupIndex);

  void populateChildNodeMap(
      const google::protobuf::RepeatedPtrField<proto::Type>& schema,
      uint32_t root,
      uint32_t current);
};

} // namespace kumo::pollux::dwrf::encryption
